Patek Philippe leaps forward with its perpetual calendar watches

Among a handful of watches that Patek Philippe introduced this year, the yellowgold version of the Ref. 5270J-001 Perpetual Calendar Chronograph ($176,240) stands out. The timepiece’s transparent sapphire-crystal case back showcases its intricate movement, which initially debuted in 2011 as the first chronograph with a perpetual calendar crafted entirely in-house. It’s just the latest leap…
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